B01D 61/14
Ultrafiltration
Official title: Ultrafiltration; Microfiltration
B01D61/14 (Ultrafiltration) appears on 3,573 US grants and 4,175 published applications in this corpus.
Search patents in B01D- Granted patents
- 3,573
- Published applications
- 4,175
- Assignees
- 2,210
- Inventors
- 9,624
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1976 | 14 | 0 |
| 1977 | 12 | 0 |
| 1978 | 22 | 0 |
| 1979 | 7 | 0 |
| 1980 | 20 | 0 |
| 1981 | 12 | 0 |
| 1982 | 17 | 0 |
| 1983 | 15 | 0 |
| 1984 | 21 | 0 |
| 1985 | 17 | 0 |
| 1986 | 26 | 0 |
| 1987 | 43 | 0 |
| 1988 | 50 | 0 |
| 1989 | 44 | 0 |
| 1990 | 54 | 0 |
| 1991 | 53 | 0 |
| 1992 | 61 | 0 |
| 1993 | 51 | 0 |
| 1994 | 37 | 0 |
| 1995 | 47 | 0 |
| 1996 | 63 | 0 |
| 1997 | 51 | 0 |
| 1998 | 60 | 0 |
| 1999 | 63 | 0 |
| 2000 | 62 | 0 |
| 2001 | 92 | 24 |
| 2002 | 78 | 98 |
| 2003 | 68 | 134 |
| 2004 | 78 | 170 |
| 2005 | 71 | 132 |
| 2006 | 72 | 123 |
| 2007 | 76 | 109 |
| 2008 | 65 | 110 |
| 2009 | 52 | 120 |
| 2010 | 66 | 117 |
| 2011 | 74 | 131 |
| 2012 | 73 | 134 |
| 2013 | 72 | 148 |
| 2014 | 79 | 138 |
| 2015 | 97 | 165 |
| 2016 | 98 | 158 |
| 2017 | 104 | 216 |
| 2018 | 126 | 194 |
| 2019 | 154 | 214 |
| 2020 | 180 | 255 |
| 2021 | 177 | 247 |
| 2022 | 154 | 230 |
| 2023 | 159 | 242 |
| 2024 | 141 | 236 |
| 2025 | 144 | 177 |
| 2026 | 101 | 153 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Subgroups
Granted patents
- B01D 61/145Ultrafiltration1,530
- B01D 61/18Apparatus therefor1,285
- B01D 61/147Microfiltration973
- B01D 61/22Controlling or regulating515
- B01D 61/16Feed pretreatment460
- B01D 61/20Accessories433
- B01D 61/149Multistep processes comprising different kinds of membrane processes selected from ultrafiltration or115
Recent patents
- Tetraazadodecane based chelating agents for separation of rare earth elements and method therefor6 Oct 2026US 12,752,219 B2Ustav Organicke Chemie A Biochemie Av Cr, V. V. I.
- Eco-friendly membranes for separations6 Oct 2026US 12,752,241 B2Khalifa University of Science and Technology
- Preparation method for iron phosphate powder by microporous filtration and concentration and preparation device thereof6 Oct 2026US 12,753,078 B2Zhejiang Dong'ou Filtering Machinery Manufacturing Co., Ltd.
- Fluid filtration device29 Sep 2026US 12,746,512 B2PathOtrak, LLC
- Vessel, system, and associated method for product concentration29 Sep 2026US 12,746,513 B2Repligen Corporation
- Concentrated milk protein preparations8 Oct 2026US 2026/0305634 A150G Inc.
- Modular multiplatform system for mrna drug production8 Oct 2026US 2026/0306407 A1BioNTech SE
- Modified polyvinylidene fluoride membranes for water filtration8 Oct 2026US 2026/0307011 A1Uchicago Argonne, LLC
- Systems, Methods, and Apparatuses for Producing and Packaging Medical Fluids8 Oct 2026US 2026/0307835 A1
- Method for isolating fetuin-a8 Oct 2026US 2026/0308213 A1PreviPharma GmbH
Most cited
By later US patents
- Mesoscale polynucleotide amplification devices1,091US 5,587,128 AThe Trustees of the University of Pennsylvania · 1996
- Mesoscale polynucleotide amplification device and method1,042US 5,498,392 AThe Trustees of the University of Pennsylvania · 1996
- Melt-blown fibrous web1,019US 5,582,907 APall Corporation · 1996
- Capillary filtration and collection method for long-term monitoring of blood constituents873US 4,777,953 AAsh Medical Systems, Inc. · 1988
- Capillary filtration and collection device for long-term monitoring of blood constituents842US 4,854,322 AAsh Medical Systems, Inc. · 1989